What's the one single car part you don't understand on your car?

Witch craft and wizardry Gabz. And leave it as that

Pretty much all of it, although I absolutely love cars and have done for as long as I remember but I don’t actually have the faintest idea of how to fix anything

Why it came with a v6 from the factory when a v8 from a truck of the same year literally bolts right in place.

the fact that every time we go over a small bump the whole car feels like it died

lnsp2, dont know what that code means.

Didn’t know it was a part..

Bus and ECUs communication.

I kinda don’t understand Manual transmissions.

The blinking thing on my headlights. Don’t know why they’re there. Must be a mistake from the factory.

Turn lights